I have a modified Pro Boat Bud as well. I am running a rear exhaust buggy .18 with the flex and the adjustable strut off the back. It runs great on a X437/3. Faster with a Y536 but it is suffers handeling wise. I would think that with a .21 you could run a X440/3 real well. I was able to turn a back cut X442 but it was hard to get on the pipe. I couldn't get a V937/3 too hook up and a 2135 would bite (eventually) but I had to run the strut so deep that the stability really suffered. Hope this helps.Gale54 said:What are some good props to start with on sport 20? Running a modifed pro boat bud with 3/16 shaft and rossi long stroke engine. Thanks Don
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